Lock



FIG. 1 is a perspective view of a lock showing my new design;

FIG. 2 is a perspective view thereof, with the pivot lever flipped up to expose the key lock activating element;

FIG. 3 is a front view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a rear view thereof. 

The ornamental design for a lock, as shown and described. 